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Transcriptomic study on the impact of temporomandibular joint internal derangement in the condylar cartilage of rabbits.

ABSTRACT: Internal derangement (ID) in the temporomandibular joint (TMJ) compromises a group of clinical problems, and holds a relative high prevalence in populations. However, the temporal genomic change in gene expression of condylar cartilage during continuous ID remains unclear. Here we reported the differentially expressed gene pattern in condylar cartilage of rabbits with ID from 1 to 8 weeks by microarray analysis. The whole genome project was deposited at GenBank under the accession PRJNA278127. The microarray analysis showed that 6478 genes have more than two-fold changes among all the tested transcripts. Many inflammation gene increased rapidly in the early stage while decrease later. On the contrary, the bone construction related genes showed a low level at first and increased at later period in the ID progression. Besides, the current study found some genes such as HLA2G, which had never been reported, might be relevant with ID.

SUBMITTER: Wang S

PROVIDER: S-EPMC4583689 | biostudies-literature | 2015 Sep

REPOSITORIES: biostudies-literature

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Transcriptomic study on the impact of temporomandibular joint internal derangement in the condylar cartilage of rabbits.

Wang Shuhua S Xu Gaoli G Deng Liquan L Gu Zhiyuan Z

Genomics data 20150711

Internal derangement (ID) in the temporomandibular joint (TMJ) compromises a group of clinical problems, and holds a relative high prevalence in populations. However, the temporal genomic change in gene expression of condylar cartilage during continuous ID remains unclear. Here we reported the differentially expressed gene pattern in condylar cartilage of rabbits with ID from 1 to 8 weeks by microarray analysis. The whole genome project was deposited at GenBank under the accession PRJNA278127. T ...[more]

PMID: 26484287

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Project description:Objective The purpose of this study was to find the key regulatory genes and proteins in condylar ossification of temporomandibular joint (TMJ) by transcriptomics and proteomics in porcine embryos. Method A total of 12 miniature pig embryos (6 in each group) at E45 and E85 days were used in this study. Six embryos for tissue sections (3 in each group) . The remaining six embryos were cut down the condyle along the parallel line between the lowest point of the sigmoid notch and the highest point of the condyle, and each condylar tissue sample was divided into two parts averagely. After RNA extraction, library construction and sequencing, one part tissue was analyzed by mapping to compare the differential expression of mRNA before and after ossification of embryonic condylar tissue. Another tissue was analyzed by protein extraction, enzymolysis and mass spectrometry to compare the differential expression of protein before and after ossification of embryonic condylar tissue. Finally, the differential genes and proteins were analyzed by GO and KEGG enrichment analysis. The differentially expressed genes in transcriptome and proteomic analysis were verified by QPCR. Result A total of 25322 genes were detected by transcriptome analysis, and there were 19584 differential genes between E85 days and E45 days. There are 1592 differential genes were screened to meet the Fold change≥2 or ≤0.5 of which 1086 genes were up-regulated and 506 genes were down-regulated in E85 days compared with E45 days. A total of 4613 proteins were detected by proteomic analysis, there were 419 differential proteins between E85 and E45 days, including 313 up-regulated proteins and 106 down-regulated proteins. A total of 37 differentially expressed genes/proteins were found by cross transcriptome and proteomic analysis. QPCR analysis showed that 13 of 15 genes were consistent with transcriptome analysis. Conclusion Condylar transcriptome and proteomic analysis during the development of temporomandibular joint in miniature pigs revealed the regulatory genes/proteins of condylar ossification. These regulatory genes/proteins can provide basic data for human TMJ development research and disease treatment.

Project description:Temporomandibular dysfunction involving anterior disc derangement with or without reduction, secondary to posterior ligament insufficiency is typically managed conservatively with success in a majority of patients. When conservative management fails, the next step in the continuum of care is unclear. Platelet-rich plasma injection combined with a 3-week immobilization period may be effective in treating posterior ligament insufficiency following a period of physical therapy. The result of this case was exceptionally successful, with the patient reporting 100% improvement 6 months post-injection. Prior to this case, we predicted a 20% success rate based on her inability to maintain the effects of conservative management over the long term.A 33-year-old white woman presented with temporomandibular dysfunction, which responded to an initial course of physical therapy aimed at restoring the mechanics of her temporomandibular joint, exercise management, and education on self-management strategies. She returned 20 months later and responded well to another course of physical therapy. Despite improvement in pain, range of motion, and mechanics, she continued to present with a reduction click at the end range of opening. The crisp and loud nature of the reduction click indicated a viable posterior ligament and reduction of the anteriorly displaced disc. She opted for platelet-rich plasma injection, provided by a chronic pain specialist with the assistance of a physical therapist. She was immobilized for 3 weeks, followed by a weaning period with reduced posterior support for an additional 5 weeks. Follow-up appointments with a physical therapist occurred at 3 weeks, 8 weeks, and 6 months post-injection.At 6 months, she reported 100% improvement. Objectively, there was no indication that the disc condyle relationship was disrupted. At 6 months post-platelet-rich plasma injection, preceded by a period of conservative physical therapy management, and followed with appropriate physical therapy follow-up, this individual had complete resolution of her anterior disc derangement with reduction.

Dataset Information

Transcriptomic study on the impact of temporomandibular joint internal derangement in the condylar cartilage of rabbits.

Publications

Transcriptomic study on the impact of temporomandibular joint internal derangement in the condylar cartilage of rabbits.

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